#ifndef __NET_FRAG_H__
#define __NET_FRAG_H__

struct netns_frags {
	int nqueues;
	atomic_t mem;
	struct list_head lru_list;

	/* sysctls */
	int timeout;
	int high_thresh;
	int low_thresh;
};

struct inet_frag_queue {
	struct hlist_node list;
	struct netns_frags *net;
	struct list_head lru_list;	/* lru list member */
	spinlock_t lock;
	atomic_t refcnt;
	struct timer_list timer;	/* when will this queue expire? */
	struct sk_buff *fragments;	/* list of received fragments */
	ktime_t stamp;
	int len;		/* total length of orig datagram */
	int meat;
	__u8 last_in;		/* first/last segment arrived? */

#define INET_FRAG_COMPLETE	4
#define INET_FRAG_FIRST_IN	2
#define INET_FRAG_LAST_IN	1
};

#define INETFRAGS_HASHSZ		64

struct inet_frags {
	struct hlist_head hash[INETFRAGS_HASHSZ];
	rwlock_t lock;
	u32 rnd;
	int qsize;
	int secret_interval;
	struct timer_list secret_timer;

	unsigned int (*hashfn) (struct inet_frag_queue *);
	void (*constructor) (struct inet_frag_queue * q, void *arg);
	void (*destructor) (struct inet_frag_queue *);
	void (*skb_free) (struct sk_buff *);
	int (*match) (struct inet_frag_queue * q, void *arg);
	void (*frag_expire) (unsigned long data);
};

void inet_frags_init(struct inet_frags *);
void inet_frags_fini(struct inet_frags *);

void inet_frags_init_net(struct netns_frags *nf);
void inet_frags_exit_net(struct netns_frags *nf, struct inet_frags *f);

void inet_frag_kill(struct inet_frag_queue *q, struct inet_frags *f);
void inet_frag_destroy(struct inet_frag_queue *q,
		       struct inet_frags *f, int *work);
int inet_frag_evictor(struct netns_frags *nf, struct inet_frags *f);
struct inet_frag_queue *inet_frag_find(struct netns_frags *nf,
				       struct inet_frags *f, void *key,
				       unsigned int hash);

static inline void inet_frag_put(struct inet_frag_queue *q,
				 struct inet_frags *f)
{
	if (atomic_dec_and_test(&q->refcnt))
		inet_frag_destroy(q, f, NULL);
}

#endif
